Inspired by waterbubbles and its unique geometrical ability, this aquatic centre, dubbed "water cube" will host the main swimming and diving competition events in Beijing's 2008 Summer Olympics. Its ETFE-clad metal frame was modeled after the natural form of soap bubbles and with over 100,000 m² of ETFE covering the building, it is the largest ETFE clad structure in the world. This material allows greater light and heat penetration than glass, reducing the building's energy costs by 30%. The center will have a total seeting capacity of 17,000 during the games - afterwards it will be reduced to 6,000.
Other cool facts? ETFE doesn't burn like normal plastics.